Interestingly this is one of those things that gets spun as bad no matter which side of the argument you find yourself on. The effect here is deflation in food prices.
Here's a story from Feburary talking about the effect, but not making the connection: https://www.reuters.com/markets/commodities/us-farm-income-s...
There was a HUGE SPIKE in farm income in 2021-22 to the tune of like 60% owing to the pandemic effects on prices (mostly due to transport and not agriculture per se, as I understand it). It was level in 2023 and is now crashing back to something approximating a baseline level.
Everyone complained like crazy about this and we had all those doomsday articles about inflation. Now it's reversing, and... it's still bad. Economics discussion can't win, pessimism rules.
As far as John Deere, it just looks to me like they staffed up too hard over the boom and are having to correct.